Enhance README with integration details and features

[ashutoshkhainar33-star]

Expanded the README to include detailed integration steps, prerequisites, and features of the FastPix Video Data SDK for THEOplayer on iOS.

FastPix Video Data THEOPlayer SDK - Documentation PR

Documentation Changes

What Changed

• New documentation added
• Existing documentation updated
• Documentation errors fixed
• Code examples updated
• Links and references updated

Files Modified

• README.md
• docs/ files
• USAGE.md
• CONTRIBUTING.md
• Other: _______________

Summary

Brief description of changes:

Code Examples

import THEOplayerWrapper

// Initialize the FastPix SDK for tracking THEOPlayer analytics
let fpDataSDK = InitTHEOPlayerTracking()

// Configure metadata for the video
let customMetadata = [
    "data": [
        "workspace_id": "WORKSPACE_KEY",    // Your FastPix Workspace Key
        "video_title": "Test Content",      // Video title
        "video_id": "VIDEO_ID",             // Unique video identifier
        "viewer_id": "user12345",           // Optional: unique viewer identifier
        "video_content_type": "series",     // Type of content (movie, series, etc.)
        "video_stream_type": "on-demand",   // Type of streaming (live, on-demand)
        "custom_1": "",                     // Optional custom metadata
        "custom_2": ""
    ]
]

// Track THEOPlayer instance
fpDataSDK.trackTheoPlayer(
    player: THEOplayer,   // Your THEOPlayer instance
    customMetadata: customMetadata
)

// Dispatch example events
fpDataSDK.dispatchEvent(event: "playing", metadata: [:])
fpDataSDK.dispatchEvent(event: "pause", metadata: [:])
fpDataSDK.dispatchEvent(event: "seeking", metadata: [:])
fpDataSDK.dispatchEvent(event: "ended", metadata: [:])
fpDataSDK.dispatchEvent(event: "buffering", metadata: [:])
fpDataSDK.dispatchEvent(event: "error", metadata: [
    "player_error_code": "404",
    "player_error_message": "Video not found"
])

// Notify FastPix SDK of a video change (e.g., playlist or series)
fpDataSDK.dispatchEvent(event: "videoChange", metadata: [
    "video_id": "123def",
    "video_title": "Daalcheeni",
    "video_series": "Comedy Capsule"
])

Testing

• All code examples tested on iOS
• Links verified
• Grammar checked
• Formatting consistent

Review Checklist

• Content is accurate
• Code examples work as expected
• Links are working
• Grammar is correct
• Formatting is consistent

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Ready for review!